So let me see if I get this, just after demanding help in rude manners to three devblogs without even trying to solve things on your own you come here and post:
>how to save and make a countdown>Ignoring the help thread and archives>Not lurking(you'd know what is wrong with this thread if you did)>Ignoring this clue which solves all your problems and you can even just copy paste if you're lazy >>556>in wrong board
Yet we're assholes.
You're not tricking anyone, no one's going to believe you googled and checked tutorials, yet it was impossible to figure out how to make a save point.
You're not asking how to handle parallaxes to make your maps look epic or how to have diagonal movements or something that takes some struggle for a begginer, you're asking how to make a save point.
Here Rin has the patience to tell you how to make a save point: https://yumeresource.tumblr.com/post/148790281837/two-questions-again-how-can-i-maka-a-save
Took me literal seconds to open YN with RPG Maker and spot the event where the countdown appears.(which also counts for your save point if you want to make it look exactly like in YN)
About your third issue, you're not giving enough information, your maps shouldn't dissapear when you just edit events.
However I don't think anyone would want to help you with that attitude, users were pointing out that your post is wrong, no one here was hostile but you.
To have a better time as a dev try:
1-Solving it on your own.
3-Check the many dev forums and help threads.
4-If nothing works, ask someone for help.
5-Lurk before posting.